Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species
Brachiaria species have the ability to suppress nitrification in soil by releasing an inhibitory compound called ‘brachialactone’ from its roots; a process termed biological nitrification inhibition (BNI). This study tested the hypothesis that endophytic association with Brachiaria grass improves BN...
| Autores principales: | , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
OMICS Publishing Group
2017
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/82881 |
| _version_ | 1855539785026764800 |
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| author | Odokonyero, Kennedy Acuña, Tina Botwright Cardoso Arango, Juan Andrés Jiménez Serna, Juan de la Cruz Rao, Idupulapati M. Nuñez, Jonathan Arango, Jacobo |
| author_browse | Acuña, Tina Botwright Arango, Jacobo Cardoso Arango, Juan Andrés Jiménez Serna, Juan de la Cruz Nuñez, Jonathan Odokonyero, Kennedy Rao, Idupulapati M. |
| author_facet | Odokonyero, Kennedy Acuña, Tina Botwright Cardoso Arango, Juan Andrés Jiménez Serna, Juan de la Cruz Rao, Idupulapati M. Nuñez, Jonathan Arango, Jacobo |
| author_sort | Odokonyero, Kennedy |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Brachiaria species have the ability to suppress nitrification in soil by releasing an inhibitory compound called ‘brachialactone’ from its roots; a process termed biological nitrification inhibition (BNI). This study tested the hypothesis that endophytic association with Brachiaria grass improves BNI activity of root tissues and reduces nitrification in Brachiaria-cultivated soil. Four cultivars of Brachiaria [i.e., B. decumbens (Basilisk), B. humidicola (Tully), B. brizantha (Marandu)], and one hybrid (Cayman) were evaluated for their BNI potentials under greenhouse and field conditions. In each experiment, plants were grown with (E+) and without (E-) endophyte inoculation, and harvested after eight months of growth. Root tissues and rhizosphere soil were taken from 0-30 cm depth and analyzed for BNI activity and nitrification, using bioluminescence assays and soil incubation, respectively. In the greenhouse experiment, endophyte association reduced BNI activity of root tissues in at least two cultivars (Basilisk and Marandu; by 13% and 6%, respectively); and this corresponded with 9% and 10% higher rates of nitrification (for Basilisk and Marandu, respectively) in soils grown with endophyte-infected plants than in the control. Under field conditions, endophyte association increased rates of nitrification in Marandu and Cayman by a similar magnitude of 12%, compared with endophyte-free control. In both experiments, Tully and Basilisk were essentially the most outstanding candidates for low-nitrifying forage systems, as shown by their high BNI activity and/or low rates of nitrification. The study also showed that cultivating soils with Brachiaria grasses could offer more agronomic and environmental benefits due to low N loss through nitrification than leaving the soils bare. However, further research to identify endophyte species that could suppress soil nitrifying microbes may enhance BNI process in Brachiaria. |
| format | Journal Article |
| id | CGSpace82881 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | OMICS Publishing Group |
| publisherStr | OMICS Publishing Group |
| record_format | dspace |
| spelling | CGSpace828812025-03-13T09:45:30Z Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species Odokonyero, Kennedy Acuña, Tina Botwright Cardoso Arango, Juan Andrés Jiménez Serna, Juan de la Cruz Rao, Idupulapati M. Nuñez, Jonathan Arango, Jacobo feed crops brachiaria grass nitrification nitrificación endophytes nitrification inhibitors inhibidores de la nitrificación endofitas Brachiaria species have the ability to suppress nitrification in soil by releasing an inhibitory compound called ‘brachialactone’ from its roots; a process termed biological nitrification inhibition (BNI). This study tested the hypothesis that endophytic association with Brachiaria grass improves BNI activity of root tissues and reduces nitrification in Brachiaria-cultivated soil. Four cultivars of Brachiaria [i.e., B. decumbens (Basilisk), B. humidicola (Tully), B. brizantha (Marandu)], and one hybrid (Cayman) were evaluated for their BNI potentials under greenhouse and field conditions. In each experiment, plants were grown with (E+) and without (E-) endophyte inoculation, and harvested after eight months of growth. Root tissues and rhizosphere soil were taken from 0-30 cm depth and analyzed for BNI activity and nitrification, using bioluminescence assays and soil incubation, respectively. In the greenhouse experiment, endophyte association reduced BNI activity of root tissues in at least two cultivars (Basilisk and Marandu; by 13% and 6%, respectively); and this corresponded with 9% and 10% higher rates of nitrification (for Basilisk and Marandu, respectively) in soils grown with endophyte-infected plants than in the control. Under field conditions, endophyte association increased rates of nitrification in Marandu and Cayman by a similar magnitude of 12%, compared with endophyte-free control. In both experiments, Tully and Basilisk were essentially the most outstanding candidates for low-nitrifying forage systems, as shown by their high BNI activity and/or low rates of nitrification. The study also showed that cultivating soils with Brachiaria grasses could offer more agronomic and environmental benefits due to low N loss through nitrification than leaving the soils bare. However, further research to identify endophyte species that could suppress soil nitrifying microbes may enhance BNI process in Brachiaria. 2017 2017-07-26T19:26:05Z 2017-07-26T19:26:05Z Journal Article https://hdl.handle.net/10568/82881 en Open Access OMICS Publishing Group Odokonyero, Kennedy; Acuña, Tina Botwright; Cardoso, Juan Andrés; Jimenéz, Juan de la Cruz; Rao, Idupulapati M.; Nuñez, Jonathan; Arango, Jacobo. 2017. Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species . Journal of Plant Biochemistry & Physiology 5: 2. |
| spellingShingle | feed crops brachiaria grass nitrification nitrificación endophytes nitrification inhibitors inhibidores de la nitrificación endofitas Odokonyero, Kennedy Acuña, Tina Botwright Cardoso Arango, Juan Andrés Jiménez Serna, Juan de la Cruz Rao, Idupulapati M. Nuñez, Jonathan Arango, Jacobo Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species |
| title | Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species |
| title_full | Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species |
| title_fullStr | Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species |
| title_full_unstemmed | Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species |
| title_short | Potential Role of Fungal Endophytes in Biological Nitrification Inhibition in Brachiaria Grass Species |
| title_sort | potential role of fungal endophytes in biological nitrification inhibition in brachiaria grass species |
| topic | feed crops brachiaria grass nitrification nitrificación endophytes nitrification inhibitors inhibidores de la nitrificación endofitas |
| url | https://hdl.handle.net/10568/82881 |
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